Sofa



FIG. 1 is a top plan view of the sofa of the present invention;

FIG. 2 is a front elevation view of the sofa of the present invention;

FIG. 3 is a side elevation view of the sofa of the present invention;

FIG. 4 is a rear elevation view of the sofa of the present invention; and

FIG. 5 is a bottom view of the sofa of the present invention. 

The ornamental design for a sofa, as shown. 